077
FNCA52 TJSJ 040849
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
449 AM AST FRI SEP 4 2026
DISCUSSION
LOW FIRE WEATHER THREAT FOR TODAY.
PRZ014-042015-
SOUTHEAST COASTAL PLAINS-
449 AM AST FRI SEP 4 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 20
TEMP (24H TREND) 91 (+1) 76 (0) 92
RH % (24H TREND) 52 (+1) 90 (+7) 53
WIND 20FT/EARLY(MPH) E 11 E 10 E 12
WIND 20FT/LATE(MPH) SE 11 NE 8 SE 12
MIXING HGT(FT-AGL/MSL)4560 4810
TRANSPORT WND (MPH) E 12 E 15
VENT RATE (KT-FT) 45600 62530
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-042015-
SOUTHERN HILLS-
449 AM AST FRI SEP 4 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 20
TEMP (24H TREND) 89 (+3) 72 (-2) 90
RH % (24H TREND) 58 (-7) 98 (+9) 61
WIND 20FT/EARLY(MPH) E 10 E 9 E 11
WIND 20FT/LATE(MPH) SE 10 E 9 SE 11
MIXING HGT(FT-AGL/MSL)5650 5400
TRANSPORT WND (MPH) SE 12 E 14
VENT RATE (KT-FT) 56500 64800
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-042015-
NORTH COASTAL PLAINS-
449 AM AST FRI SEP 4 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 40
TEMP (24H TREND) 91 (+1) 75 (-1) 92
RH % (24H TREND) 60 (-5) 98 (+8) 63
WIND 20FT/EARLY(MPH) E 9 E 13 E 10
WIND 20FT/LATE(MPH) E 14 SE 6 E 17
MIXING HGT(FT-AGL/MSL)4710 4770
TRANSPORT WND (MPH) E 9 E 14
VENT RATE (KT-FT) 37680 57240
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-042015-
NORTHERN HILLS-
449 AM AST FRI SEP 4 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 20 60
TEMP (24H TREND) 90 (+2) 73 (0) 90
RH % (24H TREND) 59 (-8) 98 (+4) 64
WIND 20FT/EARLY(MPH) SE 8 E 10 E 9
WIND 20FT/LATE(MPH) E 12 SE 5 E 13
MIXING HGT(FT-AGL/MSL)5870 5360
TRANSPORT WND (MPH) E 8 E 12
VENT RATE (KT-FT) 41090 53600
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-042015-
WEST COAST-
449 AM AST FRI SEP 4 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 30
TEMP (24H TREND) 93 (+2) 73 (-1) 93
RH % (24H TREND) 56 (-10) 100 (+5) 62
WIND 20FT/EARLY(MPH) E 11 E 9 E 11
WIND 20FT/LATE(MPH) E 12 E 9 E 12
MIXING HGT(FT-AGL/MSL)4850 4710
TRANSPORT WND (MPH) SE 10 SE 10
VENT RATE (KT-FT) 43650 42390
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-042015-
EASTERN INTERIOR-
449 AM AST FRI SEP 4 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 30
TEMP (24H TREND) 90 (+2) 74 (-1) 91
RH % (24H TREND) 59 (-3) 98 (+9) 62
WIND 20FT/EARLY(MPH) SE 10 E 10 E 10
WIND 20FT/LATE(MPH) SE 11 E 10 E 11
MIXING HGT(FT-AGL/MSL)6150 5980
TRANSPORT WND (MPH) SE 12 E 14
VENT RATE (KT-FT) 61500 71760
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-042015-
LUQUILLO MOUNTAIN RANGE-
449 AM AST FRI SEP 4 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 50
TEMP (24H TREND) 85 (+2) 70 (-3) 86
RH % (24H TREND) 65 (-3) 100 (+7) 68
WIND 20FT/EARLY(MPH) SE 8 E 9 E 9
WIND 20FT/LATE(MPH) SE 10 E 6 E 10
MIXING HGT(FT-AGL/MSL)4020 4440
TRANSPORT WND (MPH) SE 13 E 14
VENT RATE (KT-FT) 44220 53280
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-042015-
CENTRAL MOUNTAIN RANGE-
449 AM AST FRI SEP 4 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 30 10 60
TEMP (24H TREND) 88 (+5) 69 (-2) 88
RH % (24H TREND) 59 (-14) 100 (+5) 67
WIND 20FT/EARLY(MPH) SE 8 SE 8 E 8
WIND 20FT/LATE(MPH) SE 9 LGT/VAR E 9
MIXING HGT(FT-AGL/MSL)6800 6140
TRANSPORT WND (MPH) SE 9 E 10
VENT RATE (KT-FT) 54400 55260
DISPERSION 5 5
DSI 6 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-042015-
CAYEY MOUNTAIN RANGE-
449 AM AST FRI SEP 4 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 30
TEMP (24H TREND) 86 (+2) 71 (-2) 86
RH % (24H TREND) 65 (-1) 100 (+7) 67
WIND 20FT/EARLY(MPH) SE 9 E 8 E 10
WIND 20FT/LATE(MPH) SE 9 E 6 E 10
MIXING HGT(FT-AGL/MSL)5020 5270
TRANSPORT WND (MPH) E 12 E 14
VENT RATE (KT-FT) 50200 63240
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-042015-
VIEQUES-
449 AM AST FRI SEP 4 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 50
TEMP (24H TREND) 92 (+2) 80 (-1) 90
RH % (24H TREND) 57 (-1) 86 (+8) 60
WIND 20FT/EARLY(MPH) E 11 E 12 E 11
WIND 20FT/LATE(MPH) E 12 E 12 E 12
MIXING HGT(FT-AGL/MSL)2950 2740
TRANSPORT WND (MPH) E 14 E 14
VENT RATE (KT-FT) 35400 32880
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-042015-
CULEBRA-
449 AM AST FRI SEP 4 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 50
TEMP (24H TREND) 92 (+3) 80 (-1) 91
RH % (24H TREND) 58 (-5) 92 (+12) 63
WIND 20FT/EARLY(MPH) E 11 E 12 E 11
WIND 20FT/LATE(MPH) E 12 E 12 E 11
MIXING HGT(FT-AGL/MSL)3010 2640
TRANSPORT WND (MPH) E 16 E 15
VENT RATE (KT-FT) 42140 34320
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-042015-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
449 AM AST FRI SEP 4 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE NONE SHOWERS SHOWERS
CHANCE PRECIP (%) 0 10 20
TEMP (24H TREND) 93 (+3) 75 (-1) 93
RH % (24H TREND) 48 (-9) 94 (+10) 53
WIND 20FT/EARLY(MPH) E 12 E 10 E 13 G21
WIND 20FT/LATE(MPH) SE 13 G21 E 11 SE 16 G23
MIXING HGT(FT-AGL/MSL)4930 4770
TRANSPORT WND (MPH) SE 15 E 16
VENT RATE (KT-FT) 64090 66780
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-042015-
SAINT THOMAS AND SAINT JOHN-
449 AM AST FRI SEP 4 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 50 40
TEMP (24H TREND) 90 (+2) 78 (-3) 88
RH % (24H TREND) 62 (+1) 93 (+13) 64
WIND 20FT/EARLY(MPH) E 13 E 13 E 12
WIND 20FT/LATE(MPH) E 13 E 12 E 12
MIXING HGT(FT-AGL/MSL)3230 2700
TRANSPORT WND (MPH) E 17 E 16
VENT RATE (KT-FT) 48450 37800
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-042015-
ST CROIX-
449 AM AST FRI SEP 4 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 30
TEMP (24H TREND) 91 (+2) 79 (-2) 89
RH % (24H TREND) 62 (+1) 93 (+10) 65
WIND 20FT/EARLY(MPH) E 13 E 12 E 12
WIND 20FT/LATE(MPH) E 13 E 12 E 12
MIXING HGT(FT-AGL/MSL)4550 4570
TRANSPORT WND (MPH) E 16 E 16
VENT RATE (KT-FT) 63700 63980
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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